//
//  MainTabBar.swift
//  sina
//
//  Created by DXapple on 15/11/11.
//  Copyright © 2015年 sqlite. All rights reserved.
//

import UIKit

class MainTabBar: UITabBar {

    override init(frame: CGRect) {
        super.init(frame: frame)
        
        setupUi()
        
    }

    required init?(coder aDecoder: NSCoder) {
//        fatalError("init(coder:) has not been implemented")
    super.init(coder: aDecoder)
        setupUi()
    }
    
    
   private func setupUi() {
        
        addSubview(composeBtn)
    }
    override func layoutSubviews() {
        
        super.layoutSubviews()
        let w = self.bounds.width / 5
        let h = self.bounds.height
        let rect = CGRect(x: 0, y: 0, width: w, height: h)
        //定义递增变量
        var index: CGFloat  = 0
        for subview in subviews {
        
            if subview.isKindOfClass(NSClassFromString("UITabBarButton")!) {
            
            subview.frame = CGRectOffset(rect, index * w, 0)
                
                index += index == 1 ? 2 : 1
                //index = 1 时候加2  等于1  加1 
                
            }
        }
        
        composeBtn.frame = CGRectOffset(rect, w * 2 , 0)
        bringSubviewToFront(composeBtn)

        
    }
    



//MARK: 懒加载 撰写按钮
    lazy var composeBtn: UIButton = {
    
        let btn = UIButton()
    
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button"), forState: UIControlState.Normal)
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button_highlighted"), forState: UIControlState.Highlighted)
        btn.setImage(UIImage(named: "tabbar_compose_icon_add"), forState: UIControlState.Normal)
        btn.setImage(UIImage(named: "tabbar_compose_icon_add_highlighted"), forState: UIControlState.Highlighted)
//        btn.sizeToFit()
 
    return btn
    }()






}
